Who was the first black prima donna soprano at the Metropolitan Opera, starring from 1961 to 2007, the first black singer to earn the top fee of
$2750 for each performance (second only to Birgit Nilsson who got
$3000), and winner of 19 Grammy awards?

Which of the following is an example of negative reinforcement? a.marty knocks over his mother's prize fern so she gives him a time out. b.gwen mows the lawn and her dad takes her out for ice cream. c.tara takes an aspirin, and her headache begins to go away. d. peter comes in late from his lunch and is fired from his job.

Afarm grows soybean and produces chickens. the opportunity cost of producing each of these products increases as more of it is produced. draw the? farm's ppf. label it ppf0. the farm adopts a new technology which allows it to use fewer resources to fatten chickens. draw a ppf that illustrates the impact of the new technology. label it ppf1.

Which of the following is characteristic of an ethnic religion? a.) the religion has spread far beyond its hearth. b.) the religion is not focused on a particular region. c.) the religion is centered on the message of a prophet. d.) the religion attempts to appeal to people everywhere. e.) the religion does not actively try to convert others